-- made Daisy wild with joy?
-- Her success in the A-level exam this year.
A. How was it that
B. When was it that
C. Why was it that
D. What was it that
网友回答
A. How was it that
B. When was it that
C. Why was it that
(答案→)D. What was it that
解析：考查特殊疑问句的强调句型。结构为：疑问词+ is/was+ it + that,根据句意究竟是什么使黛西欣喜若狂呢？所以应用What was it that，选D。